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Darren said: "Her fingers are locked and in a normal person it might indicate anxiety, but the Queen now looks so comfortable and relaxed in this position it suggests she is approachable, but not familiar."

Prince Charles may be first in line to the throne, but does not come across as a confident man, Darren claims.

His habit of touching his upper body with his hand and his tendency to hid them in pockets betrays a certain lack of self-belief.

"Any gesture where we touch ourselves — such as scratching our nose or rubbing our face — reveals that we are possibly feeling self-conscious and need to reassure ourselves.

Darren reserves praise for the 'confident' Duchess of Cornwall, who he says is clearly "comfortable in her own skin".